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96908b17ae
select, inserting a not to compensate. Add a missing isZero check
that I lost somehow.
This improves codegen of:
void *func(long count) {
return new int[count];
}
from:
__Z4funcl: ## @_Z4funcl
movl $4, %ecx ## encoding: [0xb9,0x04,0x00,0x00,0x00]
movq %rdi, %rax ## encoding: [0x48,0x89,0xf8]
mulq %rcx ## encoding: [0x48,0xf7,0xe1]
testq %rdx, %rdx ## encoding: [0x48,0x85,0xd2]
movq $-1, %rdi ## encoding: [0x48,0xc7,0xc7,0xff,0xff,0xff,0xff]
cmoveq %rax, %rdi ## encoding: [0x48,0x0f,0x44,0xf8]
jmp __Znam ## TAILCALL
## encoding: [0xeb,A]
to:
__Z4funcl: ## @_Z4funcl
movl $4, %ecx ## encoding: [0xb9,0x04,0x00,0x00,0x00]
movq %rdi, %rax ## encoding: [0x48,0x89,0xf8]
mulq %rcx ## encoding: [0x48,0xf7,0xe1]
cmpq $1, %rdx ## encoding: [0x48,0x83,0xfa,0x01]
sbbq %rdi, %rdi ## encoding: [0x48,0x19,0xff]
notq %rdi ## encoding: [0x48,0xf7,0xd7]
orq %rax, %rdi ## encoding: [0x48,0x09,0xc7]
jmp __Znam ## TAILCALL
## encoding: [0xeb,A]
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120932 91177308-0d34-0410-b5e6-96231b3b80d8
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